/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**---
 description: >
  S is a subtype of a type T, and T is a supertype of S, 
  if S has no excess properties with respect to T, 
  and S is a type parameter and the constraint of S is a subtype of T.
 module: ESNext
 isCurrent: true
 ---*/


import {Assert} from '../../../../../suite/assert.js'

let test = <T, S extends keyof T>(obj: T, key: S): any => {
  return obj[key];
}
let obj = {
  a: 'a',
  b: 'b'
}
let res = test(obj, "a");
Assert.equal(res, 'a');